Countering China, S. Korea Expands Its Own Air Defense Zone : The Two-WayThe new zone overlaps with some of the same area China laid claim to in November. The U.S. said the South Korean approach avoids confusion and threats to civilian airlines.

Countering China, S. Korea Expands Its Own Air Defense Zone

Japanese Coast Guard vessels sail near a group of disputed islands called Diaoyu by China and Senkaku by Japan.
Emily Wang/AP
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Emily Wang/AP

Japanese Coast Guard vessels sail near a group of disputed islands called Diaoyu by China and Senkaku by Japan.

Emily Wang/AP

Another diplomatic shot was fired in the spate unfolding over uninhabited islands in the East China Sea on Sunday: Countering China, South Korea announced that it was expanding its air defense zone to partially cover some of the same area China laid claim to in November.

"South Korea's Ministry of National Defense said the new zone would include two small islands and a submerged rock historically disputed with China. Air defense identification zones are not territorial claims, but they mark the airspace that countries feel are important to monitor. Officials in Washington and across Asia say the competing aerial zones raise the risk of mishaps that could trigger a broader conflict.

"South Korea plans to hold talks with 'related countries' in order to 'prevent accidental military clashes' within the expanded zone, the defense ministry said in a statement. The South said the zone, known as an ADIZ, would take effect December 15."

"This underscores the need for crisis management mechanisms and effective channels of communication between China and Japan to reduce the risk of escalation," Biden said.

The AP reports that the U.S. stood by South Korea's new air defense zone, which also overlaps with some of Japan's declared air defense zone. The U.S. State Department said South Korea's approach "avoids confusion for, or threats to, civilian airlines."

"The United States has been and will remain in close consultation with our allies and partners in the region to ensure their actions contribute to greater stability, predictability, and consistency with international practices," State Department spokeswoman Jen Psaki said, according to the AP.